:root {
  --bt-bg: #f5f6fa;
  --bt-card-bg: #fff;
  --bt-border: #e5e7eb;
  --bt-text: #111827;
  --bt-muted: #6b7280;
  --bt-primary: #2563eb;
  --bt-danger: #dc2626;
}

.container-fluid {
  width: 100%;
  padding-left: 16px;
  padding-right: 16px;
}

.row {
  display: flex;
  flex-wrap: wrap;
  margin-left: -8px;
  margin-right: -8px;
}

.row > [class*="col-"] {
  padding-left: 8px;
  padding-right: 8px;
}

.col-12 {
  flex: 0 0 100%;
  max-width: 100%;
}

.col-md-6,
.col-lg-6 {
  flex: 0 0 100%;
  max-width: 100%;
}

@media (min-width: 768px) {
  .col-md-6 {
    flex: 0 0 50%;
    max-width: 50%;
  }
}

@media (min-width: 992px) {
  .col-lg-6 {
    flex: 0 0 50%;
    max-width: 50%;
  }
}

.g-3 {
  row-gap: 12px;
  column-gap: 12px;
}

.d-flex {
  display: flex;
}

.justify-content-between {
  justify-content: space-between;
}

.align-items-center {
  align-items: center;
}

.gap-2 {
  gap: 8px;
}

.w-100 {
  width: 100%;
}

.h-100 {
  height: 100%;
}

.mb-0 {
  margin-bottom: 0;
}

.mb-3 {
  margin-bottom: 12px;
}

.mb-4 {
  margin-bottom: 16px;
}

.mt-1 {
  margin-top: 4px;
}

.mt-3 {
  margin-top: 12px;
}

.me-2 {
  margin-right: 8px;
}

.py-2 {
  padding-top: 8px;
  padding-bottom: 8px;
}

.text-muted {
  color: var(--bt-muted);
}

.text-danger {
  color: var(--bt-danger);
}

.small {
  font-size: 12px;
}

.card {
  background: var(--bt-card-bg);
  border: 1px solid var(--bt-border);
  border-radius: 10px;
  box-shadow: 0 1px 2px rgba(0,0,0,.05);
}

.card-header {
  padding: 12px 14px;
  border-bottom: 1px solid var(--bt-border);
  font-weight: 600;
}

.card-body {
  padding: 14px;
}

.form-label {
  display: block;
  margin-bottom: 6px;
  color: var(--bt-text);
  font-weight: 600;
}

.form-control,
.form-select,
textarea.form-control {
  width: 100%;
  box-sizing: border-box;
  border: 1px solid var(--bt-border);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 14px;
  background: #fff;
  color: var(--bt-text);
}

.form-control:focus,
.form-select:focus,
textarea.form-control:focus {
  outline: none;
  border-color: rgba(37,99,235,.6);
  box-shadow: 0 0 0 4px rgba(37,99,235,.15);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border-radius: 10px;
  padding: 9px 12px;
  font-size: 14px;
  border: 1px solid transparent;
  cursor: pointer;
  user-select: none;
  text-decoration: none;
}

.btn-sm {
  padding: 6px 10px;
  font-size: 12px;
  border-radius: 8px;
}

.btn-primary {
  background: var(--bt-primary);
  color: #fff;
}

.btn-outline-secondary {
  background: transparent;
  border-color: var(--bt-border);
  color: #374151;
}

.btn-outline-success {
  background: transparent;
  border-color: rgba(22,163,74,.35);
  color: #166534;
}

.btn-outline-primary {
  background: transparent;
  border-color: rgba(37,99,235,.35);
  color: var(--bt-primary);
}

.btn-outline-light {
  background: transparent;
  border-color: rgba(255,255,255,.4);
  color: #fff;
}

.btn:disabled,
.btn[disabled] {
  opacity: .7;
  cursor: not-allowed;
}

.alert {
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--bt-border);
}

.alert-info {
  background: #eff6ff;
  border-color: rgba(37,99,235,.25);
  color: #1e40af;
}

.alert-danger {
  background: #fef2f2;
  border-color: rgba(220,38,38,.25);
  color: #7f1d1d;
}